This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
What type of elements are ServiceExecutorFactory, ServiceExecutor and IOfacWSClient? I tried creating a lifeline for those but the life line aligns itself to the top. I want o create a subsystem like in the above figure. How do I go about this?